FEC 129 - VPLS with BGP auto-discovery using LDP

New version of JUNOS supports FEC 129 BGP auto-discovery.

You don't have to manually configure each pseudo wire. You will use BGP to auto discover the other PEs. no need for a site-ids (rsvp based) or vpls-ids (manual ldp psuedowires). 

Two commands to consider is the l2vpn-id which is similar to the vrf-target. And the auto-discovery-only command in BGP. 

Below will connect to various PEs 

user@router# show routing-instances 

VPLS {

    instance-type vpls;

    interface et-0/1/0.1;

    route-distinguisher 2.2.2.2:852;

    l2vpn-id l2vpn-id:100:1;

    vrf-target target:100:1;

    protocols {

        vpls {

            encapsulation-type ethernet-vlan;

            no-tunnel-services;

        }

    }

}

{master}[edit]

user@router# show protocols bgp 

path-selection external-router-id;

log-updown;

group RR {

    type internal;

    local-address 2.2.2.2;

    family l2vpn {

        auto-discovery-only;

    }

    neighbor 192.168.1.1;

    neighbor 192.168.1.2;

    neighbor 192.168.1.3;

    neighbor 192.168.1.4;

    neighbor 192.168.1.5;

    neighbor 192.168.1.6;               

    neighbor 192.168.1.7;

    neighbor 192.168.1.8;

    neighbor 192.168.1.10;

}

{master}[edit]

user@router# show interfaces et-0/1/0 

flexible-vlan-tagging;

encapsulation flexible-ethernet-services;

unit 1 {

    encapsulation vlan-vpls;

    vlan-id 1;

    family vpls;

}

user@router# run show ldp database session 192.168.1.1 

Input label database, 2.2.2.2:0--192.168.1.1:0

  Label     Prefix

     16      FEC129 NoCtrlWord VLAN 000a0064:00000001 c0a80101 02020202

Output label database, 2.2.2.2:0--192.168.1.1:0

  Label     Prefix

      0      2.2.2.2/32

 299920      192.168.1.1/32

 299936      192.168.1.2/32

 299952      192.168.1.3/32

 299968      192.168.1.4/32

 299984      192.168.1.5/32

 300000      192.168.1.6/32

 300016      192.168.1.7/32

 300032      192.168.1.8/32

 300048      192.168.1.9/32

 300064      192.168.1.10/32

 262145      FEC129 NoCtrlWord VLAN 000a0064:00000001 02020202 c0a80101

{master}[edit]

user@router# run show bgp summary 

Groups: 1 Peers: 9 Down peers: 0

Table          Tot Paths  Act Paths Suppressed    History Damp State    Pending

inet.0               

                       0          0          0          0          0          0

inet6.0              

                       0          0          0          0          0          0

bgp.l2vpn.0          

                       9          9          0          0          0          0

inet.2               

                       0          0          0          0          0          0

Peer                     AS      InPkt     OutPkt    OutQ   Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...

192.168.1.1             852         18         20       0       0        8:07 Establ

  inet.0: 0/0/0/0

  inet6.0: 0/0/0/0

  bgp.l2vpn.0: 1/1/1/0

  inet.2: 0/0/0/0

  VPLS.l2vpn.0: 1/1/1/0

                                        

{master}[edit]

user@router# run show vpls connections 

Layer-2 VPN connections:

Legend for connection status (St)   

EI -- encapsulation invalid      NC -- interface encapsulation not CCC/TCC/VPLS

EM -- encapsulation mismatch     WE -- interface and instance encaps not same

VC-Dn -- Virtual circuit down    NP -- interface hardware not present 

CM -- control-word mismatch      -> -- only outbound connection is up

CN -- circuit not provisioned    <- -- only inbound connection is up

OR -- out of range               Up -- operational

OL -- no outgoing label          Dn -- down                      

LD -- local site signaled down   CF -- call admission control failure      

RD -- remote site signaled down  SC -- local and remote site ID collision

LN -- local site not designated  LM -- local site ID not minimum designated

RN -- remote site not designated RM -- remote site ID not minimum designated

XX -- unknown connection status  IL -- no incoming label

MM -- MTU mismatch               MI -- Mesh-Group ID not available

BK -- Backup connection         ST -- Standby connection

PF -- Profile parse failure      PB -- Profile busy

RS -- remote site standby SN -- Static Neighbor

LB -- Local site not best-site   RB -- Remote site not best-site

VM -- VLAN ID mismatch

Legend for interface status 

Up -- operational           

Dn -- down

Instance: VPLS

  L2vpn-id: 100:1

  Local-id: 2.2.2.2

    Remote-id                 Type  St     Time last up          # Up trans

    192.168.1.1               rmt   Up     Nov  7 20:58:18 2013           1

      Remote PE: 192.168.1.1, Negotiated control-word: No

      Incoming label: 262145, Outgoing label: 16

      Local interface: lsi.1048841, Status: Up, Encapsulation: VLAN

        Description: Intf - vpls VPLS local-id 2.2.2.2 remote-id 192.168.1.1 neighbor 192.168.1.1

Create your own command with op script. Show ldp statics from an mpls label.

My customer asked me whether JUNOS supports a function about ldp traffic statistics per mpls label. You can do show ldp statistics, but you have to know the prefix. I didn't find any command about the function and our firewall filter only supports label exp flag. Can we write some op script tho support it?

I created an op script that will do a reverse lookup of the prefix from the label. It combines the following commands:

show route x.x.x.x table inet.3

show ldp traffic-statistics

Basically it looks for the label that is in the inet.3 table and finds the associated route. It then looks for the ldp-traffic stats from the route.

See below on how it works:

user@router# show system                                         

host-name router;

scripts {

    op {

        file label-stats.slax;

    }

}

[edit]

user@router# run op label-stats label 300048                     

label 300048 prefix 202.0.0.0/24

202.0.0.0/24 Transit 114533658740 5726682937000 No.

202.0.0.0/24 Ingress 0 0 No.

[edit]

user@router# run show route 202.0.0.0/24 table inet.3            

inet.3: 9 destinations, 9 routes (9 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

202.0.0.0/24       *[LDP/9] 22:28:18, metric 1

                    > to 10.2.3.3 via xe-3/0/0.0, Push 300048

[edit]

user@router# run show ldp traffic-statistics | find 202.0.0.0    

 202.0.0.0/24        Transit        114543762951      5727188147550    No   

                     Ingress                   0                  0    No   

 202.0.1.0/24        Transit           110333454         5516672700    No   

                     Ingress                   0                  0    No   

 202.0.2.0/24        Transit           110333454         5516672700    No   

                     Ingress                   0                  0    No   

 202.0.3.0/24        Transit           110333453         5516672650    No   

                     Ingress                   0                  0    No   

SOURCE CODE:

------------------------------------------------------------------------------------------

version 1.0;

ns junos = "http://xml.juniper.net/junos/*/junos";

ns xnm = "http://xml.juniper.net/xnm/1.1/xnm";

ns jcs = "http://xml.juniper.net/junos/commit-scripts/1.0";

import "../import/junos.xsl";

var $arguments = <argument> {

    <name> "label";

    <description> "mpls label";

}

param $label;

param $indent = "  TEXT";

param $newline = "\n";

match / {

    <op-script-results> {

        var $result = jcs:invoke("get-route-information");

        var $test = ($result);

        <output method = "text"> {

            

            for-each ($result/route-table) {

                if (table-name == "inet.3") {

                    var $content = .;

                    

                    for-each ($content/rt/rt-entry/nh) {

                        var $check = mpls-label;

                        

                        if (contains($check, $label)) {

                            var $route = normalize-space(../../rt-destination);

                            

                            expr "label " _ $label _ " prefix " _ $route _ "\n";

                            var $stats = jcs:invoke("get-ldp-traffic-statistics-information");

                            

                            for-each ($stats/ldp-traffic-statistics) {

                                var $compare = normalize-space(./ldp-prefix);

                                

                                if ($compare == $route) {

                                    expr normalize-space(.);

                                    expr ".\n";

                                }

                            }

                        }

                    }

                }

            }

        }

    }

}